Fair Value Measurements (Carrying Amounts And Fair Values Of Financial Instruments) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 28, 2012		Dec. 31, 2011
Assets:
Available-for-sale securities	$ 402,900		$ 287,000
Liabilities:
Currency swap agreement	42,400		53,900
Carrying Amount
Assets:
Available-for-sale securities	402,862		287,007
Liabilities:
Short-term borrowings	55,063		98,392
Long-term borrowings	4,659,158		5,206,800
Currency swap agreement	42,413		53,888
Fair Value
Assets:
Available-for-sale securities	402,862	[1]	287,007
Liabilities:
Short-term borrowings	55,063	[1]	98,392
Long-term borrowings	5,320,900	[1]	5,790,100
Currency swap agreement	$ 42,413	[1]	$ 53,888

[1] Effective January 1, 2012, the Company is required to disclose, on a prospective basis, the level within the fair value hierarchy at which the fair values of the financial instruments are categorized. As of September 28, 2012, available-for-sale securities and short and long-term borrowings were categorized as level 1, while the currency swap agreement was categorized as level 2.